Soma 642/036 RLR(1974) is 11.0m below BM Attach-27
Documentation added 2009-11-17
The relevant authority for this station is the Geographical Survey Institute. For some reason the data for 1998 was not downloaded from this authority. Data downloaded and entered 17.11.09.
Documentation added 2012-02-22
A massive earthquake of magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday 11th March 2011 with the epicentre situated approx. 70km east of the Oshika Peninsula of Tohoku. It was the largest earthquake to strike Japan and triggered a tsunami with waves of up to 40.5m and travelling inland up to 10km. From the data plot it is obvious that the tide gauge was probably destroyed. Data following the earthquake has been flagged.
Documentation added 2014-03-13
The GPS benchmark information has been downloaded from the SONEL website. GPS benchmark P106 is 14.116m above RLR.
Documentation added 2016-03-16
Although data following the earthquake has been flagged it now looks as if a replacement gauge could have been installed. Until further information is available the datapoints remain flagged but will be reviewed in the future.
Geographical Survey Institute Kitasato -1 Tsukuba-shi Ibaraki-ken 305